Compound for sealing punctures in pneaumatic tires.



' UNITED STATES PATENT OFFICE.

DANIEL CHARLESTON, OF MELBOURNE, VICTORIA, AUSTRALIA.

I COMPOUND FOR SEALING .PUNCTURES IN PNEUMATIC TIRES.

Specification of Letters Patent.

' Patented Oct. 9, 1906.

Application filed October 5, 1905. Serial No. 281,423.

To all whom it may concern:

Be it known that I, DANIEL CHARLESTON, a subject of the King of Great Britain and Ireland, residing at 226 Elizabeth street, Mel bourne, in the county of Bourke, State of Victoria, and Commonwealth of Australia, have invented a certain new and useful (7omp'ound for Sealing Punctures in Pneumatic Tires and the Like, of which the following is aspecification.

The object of my invention is to provide a mixture or compound which when placed in the air-tube of a pneumatic tire or the like or elastic tubes or rubber articles inflated by air will instantly seal any puncture or punctures made therein.

The mixture or compound is cheap in first cost, simple and efficient in operation, and can be introduced into an air-tube of a pneumatic tire or tube or rubber article without calling for skill in the operation. In the past a variety of mixtures, compositions, and solutions have been used to this end; but they have been either expensive in first cost or un-- reliable or faulty in operation. With m in vention, however, these defects have con overcome.

.My improved sealing compound is made up of the following ingredients: gum-ammonlacum, gum-thus ainericanum, water, and pyoktanim In lieu of the gumammoniacum I may employ one of the following gums: asafetida, olibanum, copal, opopanax, mastic, shellac, (orange or white.) Preferably": I use the gums ammoniaeuni and thus-americanuni, as I find the best results are thereby attained.

The ingredients are mixed in suit-able proportions, dependent upon the climate and the conditions surrounding their use; but under most circumstances the best results are obtained when used in the following approximate proportions: gum-ammomacum, forty parts, more or less; gum-thus americaniun, 19.85 .rts, more or less; water, forty parts, more or less; pyoktanm, .15 parts, more or less.

To prepare my compound, the gums ammonnu-um and thus-amcru'anum are both prelerably reduced to a powder, which powder 1s placed in a suitable receptacle and well mixed together. When. they have -been thoroughly mixed and commingled the water is added and finally the pyoktanin. After being again thoroughly stirred and mixed the compound is bottled or placed in suitable receptacles and is ready for use.

The compound is-introduced into the airtube of a neumatic tire through the ordinary air-in at of the same, the tire being in a deflated state for the purpose. The compound spreads around the interior of the tube, which is then inflated in the customary way. When an air-tube is punctured, the air rushes to the aperture made therein and carries with it a percentage of the compound. This entering the aperture instantaneously closes the same, and thereby seals the puncture.

What I claim is 1. The improved sealing compound for pneumatic tires -and like inflatable objects, consisting of a suitable gum-resin, thus americanum, water and an anilin dye.

2. The herein-described self-sealing punc- 'ture composition for pneumatic tires and other inflatable objects, comprising gum-ammoniacum, gum-thus ameri canuni, water, and an anilin dye.

3. The herein-described eompoun d for sealing punctures in pneumatic tires and other rubber articles inflated by air consisting of gum-ammoniacum, gum-thus americanum, water and pyoktanin.

4. The herein-described compound for sealing punctures in pneumatic tires and like Till)".

ber articles inflated by air, consisting of gumammoniac um forty parts (more or less), gumthus an'iericanum 19.85 parts (more or less), Water forty parts (more or loss), and pyokta nin .15 parts (more or less) prepared in the manner hcreinbefore described.

5. The herein described compound for sealing punctures in pneumatic tires and other elastic tubes or rubber articles inflated by air consisting of the following ingredients and mixed in the following approximate pro-- portions: gum-rcsin forty parts (more orless) and gumthus'arnericanum 19.85 parts; gum-ammoniacunil gum-thus amerieanum, Water fonty' arts (more less) prepared in and water. v 10 the manner *ereinbefore described. In testimony whereof I aflix my signature 6. A self-sealing compound fer pneumatic in the presence of two subscribing witnesses.

5;"tires and the like consistlng of al suitable gum- DANIEL CHARLESTON.

Eresin, thusfameri'canu'm and water. Witnesses: ;-7.'A se lfsealing (puncture compeund for CECIL M. PLAs RIN, Pneumatic tiresan "the hke, consisting of GEORGE M KEN. 

